It means the breaking down of old ways to make way for new ones.
The negative influence can be if the questioner doesn't want to change, but the tower will fall whether they like it or not and if they don't embrace that change, that's when it starts getting difficult.
I've always interpretted the Tower as a sudden, unexpected, disruptive change, that isn't necessarily bad but will be uncomfortable at the time. It's almost as if the tower exploded, but a new, better one will be rebuilt.
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